Bunch building mechanism



Feb. 2, 1937.

J. A: JESSEN BUNCH BUILDING MECHANISM Fi1 e d Aug. 17, f 1954 '6Sheets-Sheet l Feb 2, 1937.

J. A. JESSEN BUNCH BUILDING MECHANISM Filed Aug. 17, 1934 6 Sheets-Sheet2 INVENTOR.

y M ATTORNEYS.

Feb. 2, 1937. J. A. JESSEN 2,069,450

BUNCH BUILDING MECHANISM Filed Aug. 17, 1954 e Sheets-Sheet a INVENTOR.

, BY M 1937- J. A. JESSEN BUNCH BUILDING MECHANISM 6 Sheets-Sheet 4INVENTOR. I t g i I ATTORNEYS.

Filed Aug. 17, 1934 Fell .J. A. JESSEN BUNCH BUILDING MECHANISMFiledAug. 17, 1934 '6 Sheets-Sheet 5 l NVEN TOR.

ATTORNEYS.

Feb. 2, 1937. EN 2,069,450

BUNCH BUILDING MECHANISM Filed Aug. 17, 1954 6 Sheets-Sheet 6 BY dfieww/A TTORN E Y5,

VII

Patented Feb. 2, 1937 PATENT OFFICE BUNCH BUILDING MECHANISM John A.Jessen, Whitinsville, Mass, assignor to Whitin Machine Works,Whitinsville, Mass., a corporation of Massachusetts Application August17, 1934, Serial No; 740,313

9 Claims.

This invention relates to spinning frames and particularly to thewinding of bobbins thereon for use in automatic weft replenishing looms.For such purposes it is customary to wind a small preliminary bunch ofyarn on each bobbin adjacent the base or butt and before the regularwinding of the bobbin is started.-

It is the general object of my invention to provide an improved andsimplified mechanism for such purposes, by which mechanism a preliminarybunch of yarn of the desired size may be wound on the bobbin by theprovision of a special short traverse of the ring rail or spindle rail,and by which mechanism the regular traverse and winding will beautomatically substituted for the short traverse as soon as the desiredbunch has been produced.

In the preferred form of my invention, I provide a manually insertablemember which controls the winding of a bunch and which is released fromthe building mechanism as soon as the bunch is completed.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

Two forms of my invention are shown in the drawings, one form relatingto spinning frames having movable spindle rails and the other form toframes having movable ringrails.

In the drawings,

Fig. 1 is a front elevation of a builder mechanism for a spinning framehaving a movable or traversing spindle rail;

Fig. 2 is an enlarged front elevation of certain parts of said buildermechanism and of a bunchbuilding attachment therefor;

Figs. 3 and 4 are detail sectional plan views, taken along the lines 3-3and 4-4 in Fig. 2 respectively;

Fig. 5 is a front elevation of a builder mechanism for a spinning framehaving a movable or traversing ring rail;

Fig. 6 is a front elevation of a bobbin having a bunch wound thereon;

Fig. 7 is an enlarged front elevation of certain parts of the buildermechanism shown in Fig. 5, the parts being in the position for regularwind and certain parts being shown in section;

Fig. 8 is a side elevation, looking in the direction of the arrow 8 inFig. 7;

Fig. 9 is a view similar to Fig. 7 but showing the parts set for windinga bunch;

Fig. 10 is a view similar to Fig. 9 but showing the parts in a differentrelation;

Fig. 11 is a sectional plan view, taken along the line in Fig. 9;

Fi 12 is a front elevation ofthe removable cam bar which controls thewinding of the bunch, and 5 Fig. 13 is an end view of the cam bar,looking in the direction of the arrow |3 in Fig. 12.

Referring to Figs. 1 to 4, I have shown my invention applied to aspinning frame having a fixed ring rail 20 and having a spindle rail 2|10 mounted on lifter rods 22 (Fig. 1) by which the rail 2| and spindlesS are given a vertical traversing movement or reciprocation.

The lower end of one lifter rod 22 is connected by a chain 23 to a bar24 secured to a sliding block 25. The block 25 is seated against the endof a shaft 26 threaded into a nut 21 having a swivel mounting in abracket 28 adjustably secured to the upper endjof a builder lever 29mounted to swing about a fixed pivot 30. r

A roll 3| is pivoted on a stand 32 adjustable lengthwise along aguideway or flange 33 of the builder lever 29 and adapted to be clampedin selected position thereon.

The roll 3| engages a side surface 34 of an intermediate lever 35extending downward from a fixed pivot 36. A cam follower or roll 31 isrotatably mounted on the lever 35 and normally engages a heart cam 38continuously rotated with a driven supporting shaft 39.

The shaft 26 is keyed to slide in a sleeve 26**, continuously and slowlyrotated by a positive gear drive identical with that shown in Fig. 5. Asthe sleeve 26 and shaft 26 are slowly rotated in the direction of thearrow at in Fig. 1, the block 25 is correspondingly moved to the left,thus lowering the spindle rail 2| and shifting the winding locus towardthe tip of the bobbin.

The parts thus far described are of the usual type found in thecommercial Skaife builder motion and in themselves form no part of mypresent invention.

in addition to these usual parts, I provide the cam shaft 39 with pinionteeth 40 (Figs. 2 and 3), and I provide a fixed guide member 4| (Figs.4,5 2 and 4) for a removable cam bar 42. A cover plate 43 retains thecam bar 42 in the guide member 4| but permits sliding movement relativethereto.

The cam bar 42 is provided with rack teeth 44 engaging the pinion teeth40 on the cam shaft 39. The cam bar is also provided with a cam surface45 positioned to engage a portion of the cylindrical surface of the roll31, which roll may be of increased axial length as indicated in Fig. 3.

The cam surface is formed in a series of alternating raised anddepressed portions or scallops, as clearly shown in Fig. 2, the relativedepth of the scallops governing the traverse of the spindle rail whilewinding the bunch. The number of scallops similarly determines thenumber of traverses of the ring rail during the bunch winding, and thelength of the cam bar determines the yardage of the bunch, as will bedescribed.

Having described the details of construction of this form of myinvention, the method of use is as follows:

Assume that a set of bobbins have been filled and doffed and that thespindle rail has been manually returned to initial position, with thepoint of the cam 38 positioned as shown in Fig. 2. and with the roll 31engaging the point of the cam.

The cam bar 42 is then manually inserted from the top in the guidemember 4| and is allowed to slide downward to the position shown in Fig.2, in which the lowermost rack tooth 44 engages one of the pinion teeth40.

The pinion is shown herein as having twelve teeth and the rack ascomprising thirty teeth. Consequently the cam bar 42 will be moveddownward and will complete its downward movement during approximatelytwo and one-half revolutions of the shaft 39 and cam 38, and at the endof this period the roll 31 will engage the heel of the cam 38.Thereupon, the cam bar 42 will be released and will drop to the floor,and the regular traverse of the spindle rail 2| under the control of theheart cam'38 will commence.

During these two and a half revolutions of the cam 38 and thecorresponding downward travel of the cam bar 42, some eight shorttraverses of the yarn on the bobbins will have been produced by thesuccessive raised and depressed portions or scallops of the cam surface45, which will have been followed by a partial winding toward the tip ofthe bobbin as the roll 3'! moves along the reduced end portion 45 of thecam surface 45.

From this description it will be seen that after the cam bar is placedin operative position as shown in Fig. 2, the entire operation isautomatic and the builder mechanism winds the desired bunch and shiftsto regular traverse without further attention.

A bobbin B having a preliminary bunch of yarn Y wound thereon is shownin Fig. 6, which also indicates in dotted lines the outline of the fullywound bobbin. By varying the length of the cam bar and the number ofrack teeth thereon, the time of bunch winding may be varied, withcorresponding change in the yardage.

Referring to Figs. 5 to 13 inclusive, I have shown my invention appliedto a spinning frame having a fixed spindle rail and having a movablering rail 5| mounted on lifter rods 52 and reciprocated by a buildermotion which is in general of the type previously described and knowncommercially as the Skaife builder motion.

In this type of spinning frame, it is necessary that the bunch be woundwith the movable ring rail 5| approximately at its lowest limit oftravel, While in the construction previously described the bunch iswound with the movable spindle rail 2| approximately at its upper limitof travel. This difference in operation renders necessary certaindifferences in construction which will now be described. 7

The heartcam 38 and cam shaft 39 with pinion teeth 40 may be aspreviously described, but the cam follower or roll 55 (Figs. '7 and 11)is not mounted directly on the intermediate lever 55 as in the previousconstruction but is mounted on a support 51 (Fig. 8) pivoted at 59 onthe lever 56 and. yieldingly pressed toward the cam 38 by a spring 50.

The support 51 has a segmental end surface 6| (Fig. 7) and a notch 62.During the normal operation of the spinning frame, a rotatable latch orrotary locking pin 63 is seated in the notch 62, as shown in Fig. '7,thus locking the support 5'! in fixed relation to the lever 56, so thatthe roll 55 coacts with the cam 38 as in the previous construction.

The latch 63 is preferably formed by slabbingoff the middle portion of astud or pin 64 (Fig. 8), which stud is rotatably mounted in the spacedside portions of the intermediate lever 56. The stud 64 is provided atits forward end with a plate 65 having a knob or handle 66 at its upperend.

A coil spring 6! is secured at 68 to the plate 65 and is secured at 69to the lever 56. Stop pins EB and ll limit movement of the plate 65 inboth directions and a spring plunger 12 connected to the knob or handle66 enters a recess 13 (Figs. 8 and 9) when the latch 63 is in normallocking position.

A cam roll 15 (Figs. '7, 8 and 11) is mounted in a recess in the rearface of the intermediate lever 55 and is rotatably supported on a platesecured to the lever 56 by screws H. A guide member (Fig. 11) is securedto a girt or other fixed portion of the spinning frame as in theprevious construction and provides a guideway for a cam bar 8i, which isretained in position relative to the member 80 by a cover plate 82.

The cam bar 8! has rack teeth 83 engaging the pinion teeth 45 when thecam bar is in operative position. The cam bar BI is also provided with acam surface 85 adapted to cooperate with the auxiliary cam roll 15 whenthe bar is in the position indicated in Figs. 9, 10 and 11.

A lug 85 (Figs. 9 and 11) projects rearward from the roll support 51 andengages a shoulder or ledge 87 (Figs. 12 and 13) formed on the side ofthe cam bar 8|. This ledge 81 is cut away at 88 in Fig. 12 to permitinsertion of the cam bar and is also cut away as indicated at 89 for apurpose to be described. The cam bar 8| is also provided with a shoulder90 at its rear side by which the cam bar is retained in the fixedguiding member 80.

I will now describe the operation of the bunch 4 building mechanismshown in Figs. 5 to 13 and as applied to a spinning frame having atraversing ring rail.

It is obvious that the bunch, being located adjacent the butt of thebobbin, must be wound with the ring rail approximately at its lowestlimit of travel. Accordingly, the spinning frame is stopped with theroll 55 at the heel of the cam 38, as shown in Fig. 7, and with the ringrail 5| substantially in its lowest position, the ring rail being wounddown at the time of doifing.

The cam bar 8| is then placed in the position indicated in Fig. 9, andthe spring plunger 12 (Fig. 8) is withdrawn from the recess 13. Theplate 65 is then swung to the position indicated in Fig. 9, thusunlatching the cam roll support 51.

The spring 50 (Figs. 7 and 8) not being strong enough to support theunbalanced weight of the ring rails, the regular cam roll 55 and itssupport 51 will swing to the right toward the posi.

tion indicated in Fig. 10, permitting the auxiliary cam roll E5 toengage the cam surface 85 on the cam bar 8! as in Fig. 10.

As the cam shaft 39 and cam 38 are thereafter rotated, the cam bar 8|will be gradually fed downward as indicated in Fig. 10 by engagement ofthe rack teeth thereof with the pinion teeth 45!. The cam roll support57 will be swung idly back and forth by the cam 33 against the tensionof the spring 68. The lug 86 (Fig. 11) will engage the shoulder 8?whenever the cam 38 approaches the position shown in Fig. 9, thuspreventing the cam roll support 57 from swinging far enough to the leftto be locked by the latch 63.

The winding of the bunch will continue as the cam bar Bl is feddownward, as in the form previously described. The length of the bunchwill be determined by the depth of the recesses or scallops in the camsurface 85, and the yardage will be determined by the length of the cambar, the number of layers being also determined by the number ofscallops.

As the winding of the hunch is completed, the lug 86 passes beyond theledge 87 on the cam bar BI and reaches the cut-away portion 89. On thenext movement of the cam follower 55 into the heel of the cam 38, thesupport 57 swings so far to the left that the latch 63 enters the notch62 and the spring plunger 12 reenters the recess 13, thus locking theparts in the position for regular traverse. The cam bar 8| is thereuponreleased and falls out of the builder mechanism, which mechanismrequires no further attention until the winding of the set of bobbins iscompleted.

In both forms of my invention I utilize an auxiliary cam bar which ismanually inserted in operative position after each doff and which isautomatically released from the builder mechanism after the winding ofthe hunch is completed. In both forms the length of the bunch as well asthe yardage and number of traverses is determined by the configurationof the cam surface and by the length of the cam bar. A bunch of anydesired dimensions may be produced by using a suitably selected cam bar.As the cam bar itself is extremely simple in construction, a set of suchbars of different lengths and configurations may be provided at slightcost.

Furthermore, it will be noted that the application of my improved bunchbuilding mechanism does not change or modify the operation of the usualcommercial builder mechanism to which it is applied and that saidmechanism is perfectly adapted for ordinary purposes when no bunch isdesired on the bobbins.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. In a spinning frame, a builder mechanism comprising a continuouslyrotating cam, a cam roll, a lever supporting said cam roll and normallyoscillated by said cam and cam roll, said lever depending substantiallyvertically from a fixed pivot at its upper end, an auxiliary cam bar, afixed and substantially vertical guideway for said bar, and a pinionrotated with said cam and maintained at all times in an axially fixedoperative position with respect to said guideway, said pinion engagingrack teeth on said auxiliary cam bar and thereby controlling thedownward movement of said cam bar by gravity along said guideway toeffect a series of short bunch-building oscillations of said lever, saidcam bar being freely inserted manually in the upper end of said guidewaywhen the frame is doifed and said cam bar being automatically releasedand dropped by gravity from the lower end of said guideway and from saidbuilder mechanism after the bunch is wound.

2. In a builder mechanism, a. continuously rotating earn, a lever, a camroll on said lever normally. engaged by said cam, a cam bar movablealong a fixed path and having a cam surface also engageable with saidcam roll, and means to give said cam bar an operative movement withrespect to and in engagement with said cam roll at a predeterminedspeed, said rotating cam being inoperative when said cam bar is inoperative engagement with said cam roll and becoming operative as saidcam bar is moved out of engagement with said cam roll.

3. In a builder mechanism, a continuously rotating cam, a lever, a camfollower on said lever normally engaged by said cam, a displaceable cambar mounted to move in a fixed path adjacent said cam and engageablewith said cam follower, and means to move said cam bar at apredetermined rate to give said lever a succession of shortoscillations, said rotating cam being inoperative when said cam bar isin operative engagement with said cam roll and becoming operative assaid cam bar is released and displaced.

4. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever, manually releasable means normally effective to lock said supportin a predetermined position on said lever, an auxiliary cam follower onsaid lever, auxiliary cam means engaging said auxiliary cam follower togive said lever a succession of short oscillations, and means to restoresaid first cam follower and support to said predetermined position whensaid auxiliary cam means becomes inoperative.

5. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever and manually releasable from a predetermined position on saidlever, an auxiliary cam follower on said lever, auxiliary cam meansengaging said auxiliary cam follower to give said lever a succession ofshort oscillations, means to move said first cam follower and support tosaid predetermined position when said auxiliary cam means becomesinoperative, and means to automatically lock said support in saidpredetermined position.

6. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever and manually releasable from a predetermined position on saidlever, an auxiliary cam follower on said lever, auxiliary cam meansengaging said auxiliary cam follower to give said lover a succession ofshort oscillations, means to move said first cam follower and support tosaid predetermined position when said auxiliary cam means becomesinoperative, and means to prevent return movement of said support tosaid predetermined position during said short oscillations.

7. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever, manually releasable means normally effective to lock said supportin a predetermined position on said lever, an auxiliary cam follower onsaid lever, a cam bar movable in a fixed path adjacent said auxiliarycam follower and hav ing a cam surface with a series of scallopstherein, said cam surface engaging said auxiliary cam follower, andmeans to move said cam bar to give said lever a succession of shortoscillations.

8. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever, manually releasable means normally effective to lock said supportin a predetermined position on said lever, an auxiliary cam follower onsaid lever, a cam bar movable in a fixed path adjacent said auxiliarycam follower and having a cam surface with a series of scallops therein,said cam surface engaging said auxiliary cam follower, and means to movesaid cam bar to give said lever a succession of short oscillations, saidcam bar having a portion engaging a lug on said support and therebypreventing full return movement of said support to locking positionuntil the operation of said cam bar is substantially completed.

9. In a builder mechanism, a continuously rotating cam, a lever, aregular cam follower, a support for said cam follower pivoted on saidlever, manually releasable means normally effective to lock said supportin a predetermined position on said lever, an auxiliary cam follower onsaid lever, a cam bar movable in a fixed path adjacent said auxiliarycam follower and having a cam surface with a series of scallops therein,said cam surface engaging said auxiliary cam follower, and means to movesaid cam bar to give said lever a succession of short oscillations andto release said cam bar at a time when the regular cam followersubstantially engages the heel of the rotating cam.

JOHN A. JESSEN.

